Electrostatic Shield For Head-Mounted Device Optical Module
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Solution Overview
Problem
Head-mounted devices are susceptible to the negative effects of electrostatic discharge and electrostatic coupling, which can impact the operation of electronic components such as the optical module control board and flexible electrical connectors.
Innovation Solution
The implementation of a shield assembly, including a first shield portion to cover the optical module control board and a second shield portion to cover the flexible electrical connector, which are designed to dissipate and redirect electrical charges, thereby protecting the components from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical module control board and flexible electrical connector are exposed to electrostatic discharge, then the electronic components can operate, but the components are susceptible to damage from electrostatic discharge and electrostatic coupling
Solution Approach 1:
A shield assembly is introduced as an intermediary component between the electrostatic discharge source and the electronic components (optical module control board and flexible electrical connector). The shield assembly, comprising a first shield portion and a second shield portion, acts as a mediator that intercepts and redirects electrostatic charges away from the vulnerable electronic components, thereby protecting them while allowing normal operation to continue
2Object-affected harmful factors
If a shield assembly is added to protect components from electrostatic discharge, then component protection is improved, but device complexity increases
Solution Approach 1:
The shield assembly is segmented into multiple distinct portions: a first shield portion configured to cover and protect the optical module control board, and a second shield portion configured to cover and protect the flexible electrical connector. This segmentation allows each shield portion to be independently designed and positioned to protect specific vulnerable components, reducing overall complexity compared to a single comprehensive shield
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The shield assembly effectively limits the exposure of the optical module control board and flexible electrical connector to electrical charges, preventing damage and ensuring the reliable operation of the head-mounted device.
Implementation Method 1
The first shield portion is configured to cover the surface of the optical module control board, to extend partially around the perimeter of the surface to cover the exposed electrical connections, and to dissipate an electrical charge. The second shield portion is configured to cover the flexible electrical connector to dissipate the electrical charge.
Data Source
AI summary
A head-mounted device includes a frame and a stage movably coupled to the frame. The head-mounted device includes an optical module that is configured to show content, is coupled to the stage, and is configured to move laterally relative to the frame. An optical module control board is configured to provide the content to the optical module and has a surface that includes exposed electrical connections positioned around a perimeter of the surface. The head-mounted device also includes a shield assembly that has a first shield portion and a second shield portion. The first shield portion is configured to cover the surface of the optical module control board, to extend partially around the perimeter of the surface to cover the exposed electrical connections, and to dissipate an electrical charge. The second shield portion is configured to cover a flexible electrical connector.